CVE-2026-68270

Received Received - Intake

Integer Overflow in Linux Kernel DRM SysFB

Publication date: 2026-08-10

Last updated on: 2026-08-17

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: drm/sysfb: Avoid possible truncation with calculating visible size Calculating the visible size of the system framebuffer can result in truncation of the result. The calculation uses 32-bit arithmetics, which can overflow if the values for height and stride are large. Fix the issue by multiplying with mul_u32_u32().

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-10

Last Modified

2026-08-17

Generated

2026-08-30

AI Q&A

2026-08-10

EPSS Evaluated

2026-08-29

NVD

CVE-2026-68270

EUVD

EUVD-2026-55371

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves a potential truncation issue when calculating the visible size of a system framebuffer. The problem occurs because the calculation uses 32-bit arithmetic, which can overflow if the height and stride values are large. The fix involves using the mul_u32_u32() function to prevent this truncation.

Detection Guidance

This vulnerability affects the Linux kernel's drm/sysfb component and is related to framebuffer visible size calculation. Detection requires checking the kernel version and verifying if the vulnerable code path is present. No specific commands are provided in the context to detect this issue directly.

Impact Analysis

This vulnerability may cause incorrect display output or graphical glitches if the system framebuffer's visible size is miscalculated due to the truncation issue. It primarily affects systems using large framebuffer dimensions.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It is a low-level Linux kernel issue related to framebuffer visible size calculation, which could cause system instability but does not involve data exposure or privacy violations.

Mitigation Strategies

Update the Linux kernel to a version that includes the fix for this vulnerability. The issue is resolved by using mul_u32_u32() for calculations. Check with your distribution for kernel updates addressing CVE-2026-68270.

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